/*
 *  gstvaapipostproc.h - VA-API video post processing
 *
 *  Copyright (C) 2012-2013 Intel Corporation
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2.1
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this program; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301 USA
*/

#ifndef GST_VAAPIPOSTPROC_H
#define GST_VAAPIPOSTPROC_H

#include <gst/base/gstbasetransform.h>
#include <gst/vaapi/gstvaapidisplay.h>
#include <gst/vaapi/gstvaapisurface.h>
#include <gst/vaapi/gstvaapisurfacepool.h>
#include <gst/vaapi/gstvaapifilter.h>
#include "gstvaapiuploader.h"

G_BEGIN_DECLS

#define GST_TYPE_VAAPIPOSTPROC \
    (gst_vaapipostproc_get_type())

#define GST_VAAPIPOSTPROC(obj)                          \
    (G_TYPE_CHECK_INSTANCE_CAST((obj),                  \
                                GST_TYPE_VAAPIPOSTPROC, \
                                GstVaapiPostproc))

#define GST_VAAPIPOSTPROC_CLASS(klass)                  \
    (G_TYPE_CHECK_CLASS_CAST((klass),                   \
                             GST_TYPE_VAAPIPOSTPROC,    \
                             GstVaapiPostprocClass))

#define GST_IS_VAAPIPOSTPROC(obj) \
    (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_VAAPIPOSTPROC))

#define GST_IS_VAAPIPOSTPROC_CLASS(klass) \
    (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_VAAPIPOSTPROC))

#define GST_VAAPIPOSTPROC_GET_CLASS(obj)                \
    (G_TYPE_INSTANCE_GET_CLASS((obj),                   \
                               GST_TYPE_VAAPIPOSTPROC,  \
                               GstVaapiPostprocClass))

typedef struct _GstVaapiPostproc                GstVaapiPostproc;
typedef struct _GstVaapiPostprocClass           GstVaapiPostprocClass;
typedef struct _GstVaapiDeinterlaceState        GstVaapiDeinterlaceState;

/**
 * GstVaapiDeinterlaceMode:
 * @GST_VAAPI_DEINTERLACE_MODE_AUTO: Auto detect needs for deinterlacing.
 * @GST_VAAPI_DEINTERLACE_MODE_INTERLACED: Force deinterlacing.
 * @GST_VAAPI_DEINTERLACE_MODE_DISABLED: Never perform deinterlacing.
 */
typedef enum {
    GST_VAAPI_DEINTERLACE_MODE_AUTO = 0,
    GST_VAAPI_DEINTERLACE_MODE_INTERLACED,
    GST_VAAPI_DEINTERLACE_MODE_DISABLED,
} GstVaapiDeinterlaceMode;

/*
 * GST_VAAPI_DEINTERLACE_MAX_REFERENCES:
 *
 * This represents the maximum number of VA surfaces we could keep as
 * references for advanced deinterlacing.
 *
 * Note: if the upstream element is vaapidecode, then the maximum
 * number of allowed surfaces used as references shall be less than
 * the actual number of scratch surfaces used for decoding (4).
 */
#define GST_VAAPI_DEINTERLACE_MAX_REFERENCES 2

/**
 * GstVaapiPostprocFlags:
 * @GST_VAAPI_POSTPROC_FLAG_FORMAT: Pixel format conversion.
 * @GST_VAAPI_POSTPROC_FLAG_DENOISE: Noise reduction.
 * @GST_VAAPI_POSTPROC_FLAG_SHARPEN: Sharpening.
 * @GST_VAAPI_POSTPROC_FLAG_HUE: Change color hue.
 * @GST_VAAPI_POSTPROC_FLAG_SATURATION: Change saturation.
 * @GST_VAAPI_POSTPROC_FLAG_BRIGHTNESS: Change brightness.
 * @GST_VAAPI_POSTPROC_FLAG_CONTRAST: Change contrast.
 * @GST_VAAPI_POSTPROC_FLAG_DEINTERLACE: Deinterlacing.
 * @GST_VAAPI_POSTPROC_FLAG_SIZE: Video scaling.
 *
 * The set of operations that are to be performed for each frame.
 */
typedef enum {
    GST_VAAPI_POSTPROC_FLAG_FORMAT      = 1 << GST_VAAPI_FILTER_OP_FORMAT,
    GST_VAAPI_POSTPROC_FLAG_DENOISE     = 1 << GST_VAAPI_FILTER_OP_DENOISE,
    GST_VAAPI_POSTPROC_FLAG_SHARPEN     = 1 << GST_VAAPI_FILTER_OP_SHARPEN,
    GST_VAAPI_POSTPROC_FLAG_HUE         = 1 << GST_VAAPI_FILTER_OP_HUE,
    GST_VAAPI_POSTPROC_FLAG_SATURATION  = 1 << GST_VAAPI_FILTER_OP_SATURATION,
    GST_VAAPI_POSTPROC_FLAG_BRIGHTNESS  = 1 << GST_VAAPI_FILTER_OP_BRIGHTNESS,
    GST_VAAPI_POSTPROC_FLAG_CONTRAST    = 1 << GST_VAAPI_FILTER_OP_CONTRAST,
    GST_VAAPI_POSTPROC_FLAG_DEINTERLACE = 1 << GST_VAAPI_FILTER_OP_DEINTERLACING,

    /* Additional custom flags */
    GST_VAAPI_POSTPROC_FLAG_CUSTOM      = 1 << 20,
    GST_VAAPI_POSTPROC_FLAG_SIZE        = GST_VAAPI_POSTPROC_FLAG_CUSTOM,
} GstVaapiPostprocFlags;

/*
 * GstVaapiDeinterlaceState:
 * @buffers: history buffer, maintained as a cyclic array
 * @buffers_index: next free slot in the history buffer
 * @surfaces: array of surfaces used as references
 * @num_surfaces: number of active surfaces in that array
 * @deint: flag: previous buffers were interlaced?
 * @tff: flag: previous buffers were organized as top-field-first?
 *
 * Context used to maintain deinterlacing state.
 */
struct _GstVaapiDeinterlaceState {
    GstBuffer                  *buffers[GST_VAAPI_DEINTERLACE_MAX_REFERENCES];
    guint                       buffers_index;
    GstVaapiSurface            *surfaces[GST_VAAPI_DEINTERLACE_MAX_REFERENCES];
    guint                       num_surfaces;
    guint                       deint           : 1;
    guint                       tff             : 1;
};

struct _GstVaapiPostproc {
    /*< private >*/
    GstBaseTransform            parent_instance;

    GstVaapiDisplay            *display;
    GstVaapiUploader           *uploader;
    GstVaapiFilter             *filter;
    GPtrArray                  *filter_ops;
    GstVaapiVideoPool          *filter_pool;
    GstVideoInfo                filter_pool_info;
    GArray                     *filter_formats;
    GstVideoFormat              format; /* output video format (encoded) */
    guint                       width;
    guint                       height;
    guint                       flags;

    GstCaps                    *allowed_sinkpad_caps;
    GstCaps                    *sinkpad_caps;
    GstVideoInfo                sinkpad_info;
#if GST_CHECK_VERSION(1,0,0)
    GstBufferPool              *sinkpad_buffer_pool;
#endif
    guint                       sinkpad_buffer_size;
    GstCaps                    *allowed_srcpad_caps;
    GstCaps                    *srcpad_caps;
    GstVideoInfo                srcpad_info;

    /* Deinterlacing */
    GstVaapiDeinterlaceMode     deinterlace_mode;
    GstVaapiDeinterlaceMethod   deinterlace_method;
    GstVaapiDeinterlaceState    deinterlace_state;
    GstClockTime                field_duration;

    /* Basic filter values */
    gfloat                      denoise_level;
    gfloat                      sharpen_level;

    guint                       is_raw_yuv      : 1;
    guint                       use_vpp         : 1;
    guint                       keep_aspect     : 1;
};

struct _GstVaapiPostprocClass {
    /*< private >*/
    GstBaseTransformClass       parent_class;
};

GType
gst_vaapipostproc_get_type(void) G_GNUC_CONST;

G_END_DECLS

#endif /* GST_VAAPIPOSTPROC_H */